MX2014006872A

MX2014006872A - Automatic dishwashing detergent compositions comprising ethercarboxylic acids or their salts and nonionic surfactants with a high cloud point.

Info

Publication number: MX2014006872A
Application number: MX2014006872A
Authority: MX
Inventors: Carsten Cohrs; George Italo Pitombeira Nunes
Original assignee: Clariant Finance Bvi Ltd
Priority date: 2011-12-09
Filing date: 2012-12-06
Publication date: 2014-11-25
Also published as: BR112014013868A8; US20130146097A1; US9096818B2; ES2612682T3; EP2788465A1; BR112014013868A2; JP2015500363A; WO2013083276A1; MX340146B; CN104105785A; PL2788465T3; JP6060174B2; EP2788465B1

Abstract

Automatic dishwashing detergent compositions comprising ethercarboxylic acids or their salts and nonionic surfactants with a high cloud point. The present invention relates to automatic dishwashing detergent compositions comprising: a) one or more compounds of the formula (I) wherein R is a linear or branched saturated alkyl group comprising from 8 to 30 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 30 carbon atoms, n is a number from 1 to 20, and M is a counter ion, and b) one or more nonionic surfactants having a cloud point of 30 Â°C or more, and c) one or more builder substances. The inventive automatic dishwashing detergent compositions in particular possess an advantageous anti-spotting behavior.

Description

DETERGENT COMPOSITIONS FOR AUTOMATIC WASHING OF DISHES THAT INCLUDE ETERCARBOXÍLICOS ACIDS OR ITS SALTS AND NON-IONIC TENSOACTIVE AGENTS WITH A HIGH POINT OF ENTURBING DESCRIPTIVE MEMORY The present invention is in the field of automatic dishwashing detergent compositions comprising nonionic surfactants with a high cloud point of 30 ° C or more and preferably 40 ° C or more, and ether carboxylic acids or salts of specific ether carboxylic acids.

Automatic dishwashing, especially household dishwashing, has undergone continuous changes and improvement as the format moves in the direction of all-in-one dosing systems such as paper strips, bags and even dosage units, demanding new surface active agent systems that are effective as rinse aids against fouling and film formation, while present throughout the entire wash cycle. In addition, environmental trends such as washing at lower temperatures and with less water, reducing or even banning phosphates such as sodium tripolyphosphate (STPP) and the demand for the use of raw materials from renewable resources instead of chemical Based on oil, they challenge the formulator in his choice of surfactant system. On the other hand, the freedom to select suitable surfactants is limited by the unique requirement of very low foaming compositions, which is incompatible with most common surfactant systems typically used in other cleaning compositions, for example, liquids. for manual dishwashing, where stable foam looks desirable.

It was an object of the present invention to provide detergent compositions for automatic dishwashing which, in addition to a favorable cleaning performance, in particular, also exhibit favorable anti-fouling behavior.

Surprisingly, it has now been found that this objective is achieved with detergent compositions for automatic dishwashing, comprising: a) one or more compounds of the formula (I): RO - -CH2CH20 -) - · COO (I) where: R is a linear or branched saturated alkyl group comprising from 8 to 30 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 30 carbon atoms, n is a number from 1 to 20, and M is a counterion, and b) one or more nonionic surfactants having a cloud point of 30 ° C or more and preferably having a cloud point of 40 ° C or more, and c) one or more detergency builders.

The present invention therefore provides detergent compositions for automatic dishwashing, comprising: a) one or more compounds of the formula (I): where: R is a linear or branched saturated alkyl group comprising from 8 to 30 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 30 carbon atoms, n is a number from 1 to 20, and it is a counterion, and b) one or more nonionic surfactants having a cloud point of 30 ° C or more and preferably having a cloud point of 40 ° C or more, and c) one or more detergency builders.

Due to the presence of the one or more surfactants of the formula (I) and the one or more non-ionic surfactants of the component b), detergent compositions for the automatic washing of inventive dishes show a favorable anti-fouling behavior and have a favorable cleaning performance. The surfactants of the formula (I) and the one or more nonionic surfactants of component b) do not impart greater foaming, and until now the inventive compositions are in addition to low foaming. In particular, the surfactants of formula (I) are biodegradable and based on their alcohol component RO - are based on renewable primary products, and hitherto the detergent compositions for the automatic washing of inventive dishes are also favorable for the environment. The same applies to the preferred nonionic surfactants of component b) of the detergent compositions for the automatic washing of inventive dishes such as the compounds of the formula (II).

The detergent compositions for the automatic washing of inventive dishes also have the advantage that the one or more surfactants of the formula (I) and the one or more nonionic surfactants of the component b) contained therein reveal their advantageous properties, and in particular they provide a favorable anti-fouling behavior also in the phosphate-free compositions. Compared with common low foaming nonionic surfactants, the combination of the one or more surfactants of the formula (I) and the one or more nonionic surfactants of component b) often leads to anti-fouling behavior improved.

US 4,272,394 discloses automatic dishwashing detergents containing mixtures of low foaming nonionic surfactants, wherein the second surfactant has a relatively low cloud point.

WO 94/22800 discloses low-cloud point epoxy-crowned poly (oxyalkylated) alcohols and automatic dishwashing compositions containing them.

US 6,593,287 describes non-ionic surfactants crowned with alkyl and automatic dishwashing compositions containing them.

EP 1, 757,676 discloses the use of charged surfactants including ether carboxylates, namely alkylethyloxycarboxylates, alkyl ethoxy sulfates with chain lengths and specific EO (ethyleneoxy-CH 2 CH 2 O-) levels, sulfobetaines, alkylpolyethoxysulfates, alkylpolyethoxycarboxylates and alkyl sulfates and sulfonates. However, it is mandatory that a low foaming nonionic surfactant, specifically a low cloud point surfactant with a cloud point of less than 30 ° C in water, be present in the composition to prevent foaming problems.

In the one or more compounds of the formula (I), the counterion M is preferably selected from the group consisting of H +, Na +, K +, Mg2 + / 2, Ca2 + / 2, NH4 +, monoethanolammonium, diethanolammonium and triethanolammonium.

Particularly preferably, in the one or more compounds of the formula (I), the counterion M is selected from the group consisting of H +, Na + and K +.

Examples for the alkyl and alkenyl groups R of the compounds of the formula (I) are, for example, the alkyl and alkenyl groups of the following alcohols R-OH: 1-octanol (caprylic alcohol), 2-ethyl hexanol, 1- nonanol (pelargonic alcohol), 1-decanol (capric alcohol), 1-undecanol, 1-dodecanol (lauryl alcohol), 1-tridecanol, isotridecanol, 1-tetradecanol (myristyl alcohol), 1-pentadecanol, 1-hexadecanol (cetyl alcohol ), cis-9-hexadecen-1-ol (palmitoleyl alcohol), 1-heptadecanol, 1-octadecanol (stearyl alcohol), cetearyl alcohol, 16-methylheptadecan-1-ol (isostearyl alcohol), 9E-octadecen-1-ol (elaidyl alcohol), cis-9-octadecen-1-ol (oleyl alcohol), oleyl-ethyl alcohol, 9Z, 12Z-octadecadien-1-ol (linolelic alcohol), 9E, 12E-octadecadien-1-ol (elaidolinolelic alcohol), 9Z, 12Z, 15Z-octadecatrien-1-ol (linolenyl alcohol), 9E, 12E, 15E-octadecatrien-1-ol (elaidolinolenyl alcohol), 1-nonadecanol, 1-eicosanol (arachidyl alcohol) ico), 1-heneicosanol, 1-docosanol (behenyl alcohol), cis-13-docosen-1-ol (erucyl alcohol), 1-tetracosanol (lignoceryl alcohol), 1-hexacosanol (ceryl alcohol), 1-octacosanol (alcohol montanil) and 1 -triacontanol (myristyl alcohol), or mixtures of the foregoing.

The R groups of the compounds of the formula (I) can be derived from naturally occurring R-OH alcohols, which usually comprise mixtures of different R residues.

The R groups of the compounds of the formula (I) can also be derived from synthetically prepared R-OH alcohols, such as oxo alcohols, for example, Ci2-15 oxo alcohol.

In the one or more compounds of the formula (I), R is preferably a straight or branched saturated alkyl group comprising from 12 to 18 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 12 to 18 carbon atoms.

Particularly preferably, in the one or more compounds of the formula (I), R is a linear or branched saturated alkyl group comprising from 16 to 18 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 16 to 18 carbon atoms.

Preferably, in the one or more compounds of the formula (I), 50% by weight or more of the R groups are linear or branched unsaturated alkenyl groups with one or more double bonds.

Particularly preferably, in the one or more compounds of the formula (I), R is a linear group.

Even more preferably, in the one or more compounds of the formula (I), R is an oleyl-acetyl group.

In the one or more compounds of the formula (I), n is preferably a number from 1 to 3.

Particularly preferably, in the one or more compounds of the formula (I), n is 2.

The inventive automatic dishwashing detergent compositions comprise the one or more compounds of the formula (I), preferably in amounts of 0.1 to 15% by weight, more preferably in amounts of 0.2 to 10% by weight, and in particular preferably in amounts of 0.2 to 5% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing.

The person skilled in the art knows which compounds can be used as nonionic surfactants of component b) of the detergent compositions for the automatic washing of inventive dishes, because said compounds are, for example, commercially available and their cloud points are known. .

The cloud point of the nonionic surfactants of component b) of the detergent compositions for the automatic washing of inventive dishes can also be determined in accordance with DIN EN 1890.

The one or more nonionic surfactants of component b) of the detergent compositions for the automatic washing of inventive dishes are preferably selected from the compounds of the formula (II): R10 - (- AO-) x-Z (II) where: R1 is a linear or branched saturated alkyl group comprising from 8 to 30 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 30 carbon atoms, A is selected from the group consisting of -C2H4- and -C3H6-, x is a number from 1 to 150, Z is H, a linear or branched alkyl group having from 1 to 30 carbon atoms, or a group -CH (OH) -R3, and R3 is a linear or branched alkyl group having from 1 to 30 carbon atoms, and wherein the group - (- AO-) x- comprises one or more groups -C2H4O-, and may additionally comprise one or more -C3H60- groups, and in case the group - (- AO-) x- comprises simultaneously C2H4O- and -C3H6O- groups, the groups -C2H4O- and -C3H6O- can be distributed on the group - (- AO-) x- in any way, preferably in a statistical gradient or block type manner, and particularly preferably in a block-like manner, and the molar amount of the -C 2 H 4 O- groups in the - (- AO-) x- group is preferably greater than the molar amount of the -C 3 H 6 O- groups.

Since the compounds of formula (II) do not have a cloud point as mentioned in component b) of the detergent compositions for the automatic washing of inventive dishes, they are not nonionic surfactants according to component b) of the detergent compositions for the automatic washing of inventive dishes.

As examples for the alkyl and alkenyl groups R1 of the compounds of the formula (II), the examples given above for the alkyl and alkenyl groups R of the compounds of the formula (I) may be mentioned.

R1 in formula (II) is preferably a straight or branched saturated alkyl group comprising from 8 to 22 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 22 carbon atoms, more preferably a linear or branched saturated alkyl group comprising from 8 to 18 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 18 carbon atoms, and particularly preferably a linear or branched saturated alkyl group comprising from 12 to 15 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 12 to 15 carbon atoms.

Preferably, the groups R 1 in the formula (II) are alkyl groups. x in formula (II) is preferably a number from 1 to 50, more preferably is a number from 1 to 20, and particularly preferably is a number from 5 to 20.

As examples for the alkyl groups Z and R3 of the compounds of the formula (II), the examples given above for the alkyl groups R of the compounds of the formula (I) may be mentioned. Other examples are the alkyl groups methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, n-pentyl, sec-pentyl (2-pentyl), 3-pentyl, 2- methylbutyl, iso-pentyl (3-methylbutyl), 3-methylbut-2-yl, 2-methylbut-2-yl, neopentyl (2,2-dimethylpropyl), 1-hexyl, 2-hexyl, 3-hexyl, 2- methyl-1-pentyl, 3-methyl-1-pentyl, 4-methyl-1-pentyl, 2-methyl-2-pentyl, 3-methyl-2-pentyl, 4-methyl-2-pentyl, 2-methyl- 3-pentyl, 3-methyl-3-pentyl, 2,2-dimethyl-1-butyl, 2,3-dimethyl-1-butyl, 2,3-dimethyl-1-butyl, 3,3-dimethyl-butyl, 2,3-dimethyl-2-butyl, 3,3-dimethyl-2-butyl, 2-ethyl-1-butyl, 1-heptyl, 2-heptyl, 3-heptyl and 4-heptyl.

In case Z in formula (II) is a linear or branched alkyl group, it is preferably an alkyl group having from 1 to 22 carbon atoms.

R3 in the formula (II) is preferably a linear or branched alkyl group having from 8 to 22 carbon atoms.

In a preferred embodiment of the invention, the group - (- AO-) x- consists of one or more groups -C2H4O- and does not comprise -C3H60- groups.

In another preferred embodiment of the invention, the group - (- AO-) x- comprises one or more groups -C2H4O- and one or more groups -C3H6O-. In this preferred embodiment of the invention, the molar amount of the -C3H6O- groups based on the total amount of -C2H4O- and -C3H6O- groups, is preferably less than 50%, more preferably 45% or less of 45%, particularly preferably 40% or less than 40%, and especially preferably 33% or less than 33%.

In another preferred embodiment of the invention, Z in formula (II) is H. In this preferred embodiment of the invention, the molar amount of the -C3H60- groups based on the total amount of -C2H40- and -C3H60- groups it is preferably from 20 to less than 50%, more preferably from 33 to 45%, and particularly preferably from 33 to 40%.

In case Z has a meaning other than H, the molar amount of the groups -C3H60- based on the total amount of groups -C2H4O- and -C3H60- is preferably 20% or less than 20%, and more preferably It is 10% or less than 10%.

In another preferred embodiment of the invention, Z in the formula (II) is an alkyl group having from 1 to 4 carbon atoms. In this preferred embodiment of the invention, the molar amount of the -C3H60- groups based on the total amount of -C2H40- and -C3H60- groups is preferably 20% or less than 20%, and more preferably is 10% or less than 10 %.

In another preferred embodiment of the invention, Z in formula (II) is the group -CH (OH) -R3, wherein R3 is a linear or branched alkyl group having from 8 to 22 carbon atoms. In this preferred embodiment of the invention, the molar amount of the -C3H60- groups based on the total amount of -C2H40- and -C3H60- groups is preferably 20% or less than 20%, and more preferably is 10% or less than 10 %.

In a particularly preferred embodiment of the invention, the one or more nonionic surfactants of component b) of the inventive automatic dishwashing detergent compositions they comprise on average (= molar average) 8 groups -C2H4O- and 4 groups -C3H60-, and R is a linear or branched saturated alkyl group comprising 12 to 15 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 12 to 15 carbon atoms. In these nonionic surfactants of component b) of the detergent compositions for the automatic washing of inventive dishes, Z is preferably H.

The one or more nonionic surfactants of component b) of the detergent compositions for the automatic washing of inventive dishes have, in particular, a cloud point of 40 to 60 ° C.

The inventive automatic dishwashing detergent compositions comprise the one or more nonionic surfactants of component b) preferably in amounts of 0.1 to 15% by weight, more preferably in amounts of 0.2 to 10% by weight, and in particular preferably in amounts of 0.2 to 5% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing.

The variable "n" in the one or more compounds of the formula (I) and the variable "x" in the one or more compounds of the formula (II) represent molar averages, that is, the detergent compositions for the automatic washing of Inventive dishes may comprise various compounds of the formula (I) which differ in the degree of ethoxylation and various compounds of the formula (II) which differ in the degree of alkoxylation.

The detergent compositions for the automatic washing of inventive dishes may comprise more than one compound of the formula (I) and / or more than one nonionic surfactant of component b). In this case, the detergent compositions for the automatic washing of inventive dishes may comprise, for example, more than one compound of the formula (I) which differ in the group "R" and / or which differ in the degree of ethoxylation and / or which differ in the counterion "M", and / or more than one compound of the formula (II) which differ in the group "R1" and / or which differ in the degree of alkoxylation and / or which differ in the group " Z ".

Preferably, the detergent compositions for the automatic washing of inventive dishes are free of nonionic surfactants having a cloud point of less than 30 ° C.

The detergent compositions for the automatic washing of inventive dishes comprise the one or more builder substances preferably in amounts of 5 to 90% by weight, and more preferably in amounts of 5 to 80% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing inventive.

The builders, as well as other ingredients which can be used in detergent compositions for the automatic washing of inventive dishes are described, for example, in US 2010/0160204 A1 and EP 1 757 676 A1.

Included among the detergency builders are carbonates, acid carbonates, organic builders, silicates, phosphates, phosphonates, methylglycine acetic acid (MGDA) and alkali metal hydroxides.

It is particularly preferred to use carbonates and / or acid carbonates, preferably alkali carbonates, particularly preferably sodium carbonate. These substances are preferably used in amounts of 2 to 50% by weight, preferably 10 to 30% by weight, and in particular 10 to 25% by weight, based on the total weight of the detergent composition for washing automatic tableware inventive.

Organic builders include polycarboxylates / polycarboxylic acids, polymeric carboxylates, aspartic acid, polyacetals and dextrins.

Usable organic builders include polycarboxylic acids, which can be used in the free acid form and / or their sodium salts, it being understood that "polycarboxylic acids" are those carboxylic acids that possess more than one acid function. Examples are citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, aminocarboxylic acids and nitrilotriacetic acid (NTA), as well as mixtures thereof. The free acids also typically have an acidifying component in addition to their builder effect, and thus also serve to establish a lower and more benign pH for the detergent compositions for the automatic washing of inventive dishes. Of note in this context are, in particular, citric acid, succinic acid, glutaric acid, adipic acid, gluconic acid, and any mixture thereof.

Particularly preferred inventive automatic dishwashing detergent compositions contain citrate as one of their builders. Detergent compositions for the automatic washing of inventive dishes containing from 2 to 40% by weight, preferably from 5 to 30% by weight, and in particular from 10 to 30% by weight of citrate, based on the weight are preferred. total detergent composition for automatic dishwashing inventive.

Polymeric carboxylates are also suitable as organic builders. These are, for example, the alkali metal salts of polyacrylic acid or polymethacrylic acid, for example, those having a relative molecular weight of 500 to 70,000 g / mol.

Suitable polymeric carboxylates are, in particular, polyacrylates, which preferably have a molecular weight of 2,000 to 20,000 g / mol. Due to their superior solubility, short chain polyacrylates having molar weights of 2,000 to 10,000 g / mol, and particularly preferably 3,000 to 5,000 g / mol, may be preferred.

Also suitable are copolymer carboxylates, in particular those of acrylic acid with methacrylic acid, and acrylic acid or methacrylic acid with maleic acid. The copolymers of acrylic acid with Maleic acid containing 50 to 90% by weight of acrylic acid and 10 to 50% by weight of maleic acid have proved to be particularly suitable. Their relative molecular weight, based on the free acids, is preferably from 2,000 to 70,000 g / mol, more preferably from 20,000 to 50,000 g / mol, and in particular from 30,000 to 40,000 g / mol.

In case the inventive automatic dishwashing detergent compositions comprise one or more (co) polymeric carboxylates, the amount of these (co) polymeric carboxylates in the inventive automatic dishwashing detergent compositions is preferably from 0.5 to 20% by weight, and in particular from 3 to 10% by weight, based on the total weight of the inventive automatic dishwashing detergent composition.

The detergent compositions for the automatic washing of inventive dishes may preferably contain, as a detergency builder, crystalline sheet-shaped sodium silicates of the general formula NaMSix02x + yHbO, wherein M is sodium or hydrogen; x is a number from 1.9 to 22, preferably from 1.9 to 4, with particularly preferred values for x, 2, 3 or 4; and y is a number from 0 to 33, preferably from 0 to 20.

Also usable are amorphous sodium silicates having a Na20: Si02 modulus of 1: 2 to 1: 3.3, preferably 1: 2 to 1: 2.8, and in particular 1: 2 to 1: 2.6, which they are preferably of delayed dissolution and exhibit secondary washing properties.

In case the inventive automatic dishwashing detergent compositions comprise one or more silicates, the amount of these silicates in the inventive compositions is preferably 5 to 30% by weight, and more preferably 10 to 25% by weight , based on the total weight of the detergent composition for the automatic dishwashing inventive.

Phosphates have proven to be effective builders in terms of cleaning performance. Among the many commercially available phosphates, alkali metal phosphates have the greatest significance in the laundry and cleaning agent industry, in particular pentasodium or pentapotassium triphosphate (sodium or potassium tripolyphosphate).

The term "alkali metal phosphates" is the brief designation for the alkali metal salts (in particular sodium and potassium salts) of the various phosphoric acids, in the context of which a distinction can be made between metaphosphoric acids (HP03) and acid. orthophosphoric H3P04, in addition to the representatives of higher molecular weight. Phosphates have a combination of advantages: they act as alkaline vehicles, prevent lime deposits in the parts of the machines, and contribute to cleaning performance.

The phosphates that are technically especially important are the pentosodium triphosphate NasPaO-io (sodium tripolyphosphate) and the potassium salt corresponding pentapotassium triphosphate K5P3O10 (potassium tripolyphosphate). Other preferred phosphates are the sodium and potassium tripolyphosphates.

If the phosphates are used in the detergent compositions for the automatic washing of inventive dishes, the preferred compositions contain phosphates, preferably alkali metal phosphates, in particular preferably pentasodium or pentapotassium triphosphate (sodium or potassium tripolyphosphate) in amounts of 2. at 50% by weight, preferably from 2 to 30% by weight, more preferably from 3 to 25% by weight, and particularly preferably from 3 to 15% by weight, based in each case on the total weight of the detergent composition for automatic dishwashing inventive.

Like other detergency builders, inventive automatic dishwashing detergent compositions may contain phosphonates. The weight ratio of phosphonate, based on the total weight of the inventive automatic dishwashing detergent composition, is preferably 0.5 to 20% by weight, and more preferably 1.0 to 10% by weight.

Complexing phosphonates include many different compounds such as 1-hydroxyethane-1,1-diphosphonic acid (HEDP) or diethylenetriaminepenta (methylene phosphonic acid) (DTPMP). Hydroxyalkane and aminoalkane phosphonates are particularly preferred. Among the hydroxyalkanephosphonates, 1-hydroxyethane-1,1-diphosphonate (HEDP) is of particular importance, preferably as a co-builder. It is preferably used as a sodium salt, the disodium salt reacted neutrally, and the tetrasodium salt in alkaline form (pH 9). Suitable aminoalkanphosphonates include ethylenediaminetetramethylenephosphonate (EDTMP), diethylenetriaminepentamethylenephosphonate (DTPMP), and its superior counterparts. They are preferably used in the form of the sodium salts which react neutrally (for example, as a hexasodium salt of EDTMP or as a hepta- and octa-sodium salt of DTPMP). Of the phosphonate class, HEDP is preferred.

As an alternative to phosphonates, methylglyc- indiacetic acid (MGDA) can also be used in detergent compositions for the automatic washing of inventive dishes as a complexing agent.

In case the inventive automatic dishwashing detergent compositions comprise methylglyc- indiacetic acid (MGDA), the amount of this compound in the inventive compositions is preferably from 0.5 to 25% by weight, and more preferably from 5 to 20% by weight. weight, based on the total weight of the inventive automatic dishwashing detergent composition.

The detergent compositions for the automatic washing of inventive dishes may contain as other builders alkali metal hydroxides. These alkaline carriers are preferably used only in small amounts, preferably in amounts of 10% by weight or less, more preferably 6% by weight or less, preferably 5% by weight or less, particularly preferably from 0.1 to 5% by weight. % by weight, and in particular from 0.5 to 5% by weight, based on the total weight of the inventive automatic dishwashing detergent composition.

In another preferred embodiment of the invention, the inventive automatic dishwashing detergent compositions comprise one or more builder substances selected from the group consisting of carbonates, citrates and phosphates. In a particularly preferred embodiment of the invention, the automatic dishwashing detergent compositions inventive comprise one or more detergency builders selected from the group consisting of carbonates and citrates.

The detergent compositions for the automatic washing of inventive dishes may contain the aforementioned detergency builders both individually and as mixtures of two, three, four or more detergency builders.

The detergent compositions for the automatic washing of inventive dishes preferably comprise a bleaching system. In case the inventive automatic dishwashing detergent compositions comprise a bleaching system, they comprise the bleaching system preferably in amounts of 0.1 to 40% by weight, more preferably in amounts of 0.5 to 30% by weight, and in particular preferably in amounts of 3 to 25% by weight, in each case based on the total weight of the inventive automatic dishwashing detergent composition.

The bleaching system of detergent compositions for the automatic washing of inventive dishes may comprise one or more substances selected from the group consisting of bleaching agents, bleach activators and bleach catalysts.

As another ingredient, the detergent compositions for the automatic washing of inventive dishes may contain an oxygen bleaching agent. Among the compounds which serve as bleaching agents and give H2O2 in water, sodium percarbonate, sodium perborate tetrahydrate and sodium perborate monohydrate are particularly significant. Other usable bleaching agents include peroxypyrophosphates, citrate perhydrates and peracid or peracid salts which give H2O2, such as perbenzoates, peroxophthalates, diperazelaic acid, phthaloiminoperacid or diperdodecandioic acid. Organic bleaching agents can also be used. Typical organic bleaching agents are diacyl peroxides such as dibenzoyl peroxide. Other typical organic bleaching agents are peroxyacids such as alkyl peroxy acids and aryl peroxy acids.

Preferred inventive automatic dishwashing detergent compositions contain, based on the total weight of the composition, from 1.0 to 20% by weight, preferably 4.0 to 18% by weight, and more preferably from 8 to 15% by weight. weight of an oxygen bleaching agent, preferably sodium percarbonate.

To achieve an improved bleaching effect when cleaned at temperatures of about 60 ° C and below, the inventive automatic dishwashing detergent compositions may additionally contain bleach activators. Compounds which, under perhydrolysis conditions, give aliphatic peroxycarboxylic acids preferably having from 1 to 10 carbon atoms, in particular from 2 to 4 carbon atoms, and / or optionally substituted perbenzoic acid, can be used as bleach activators. Substances possessing O- and / or N-acyl groups having the above-mentioned number of carbon atoms, and / or optionally substituted benzoyl groups are suitable. Preferred are polyacylated alkylenediamines such as tetraacetylethylenediamine (TAED), which has proved to be particularly suitable.

Bleach activators, in particular TAED, are preferably used in amounts of up to 10% by weight, in particular from 0.1 to 8% by weight, in particular from 2 to 8% by weight, and particularly preferably from 2 to 8% by weight. to 6% by weight, based in each case on the total weight of the bleach activator containing the inventive automatic dishwashing detergent composition.

In addition to or in place of conventional bleach activators, so-called bleach catalysts can also be used. These substances are transition metal complexes or transition metal salts that improve bleaching such as, for example, Mn, Fe, Co, Ru or Mo complexes or carbonyl complexes. The Mn, Fe, Co, Ru, Mo, Ti, V and Cu complexes that have nitrogen-containing tripod ligands, as well as Co, Fe, Cu and Ru amine complexes, are also usable as bleach catalysts.

It is particularly preferred to use manganese complexes in the oxidation states II, III, IV or V, preferably containing one or more macrocyclic ligands having the donor functions N, NR, PR, O and / or S. Ligands having nitrogen donating functions are preferred. It is particularly preferred to use bleach catalysts containing 1, 4,7-trimethyl-1,4,7-triazacyclononane (Me-TACN), 1,4,7-triazacyclononane (TACN), 1, 5,9-trimethyl-1 , 5,9-triazacyclododecane (Me-TACD), 2-methyl-1,4,7-trimethyl-1,4,7-triazacyclononane (Me / Me-TACN) and / or 2-methyl-1, 4,7 -triazacyclononane (Me / TACN) as macromolecular ligands. Suitable manganese complexes include [??? (μ-0)? (Μ - ???) 2 (????) 2] (?? 04) 2, [?? ", ???? (μ-) 0) 2 (μ-OAc) i TACN) 2] (BPh4) 2, [Mn¾-0) 6 (TACN) 4] (CI04) 4, [???? 2 (μ-0)? (Μ-OAc) ) 2 (Me-TACN) 2] (CI04) 2, [????????? (μ-0)? (Μ - ???) 2 (? ß - ????) 2] ( ?? 04) 3, [Mnlv2 ^ -0) 3 (Me-TACN) 2] (PF6) 2 and [??,? 2 (μ-0) 3 (? ß /? ß-TACN) 2] (PF6 ) 2 (OAc = OC (0) CH3).

In another preferred embodiment of the invention, the inventive automatic dishwashing detergent compositions contain a bleach catalyst selected from transition metal salts and transition metal complexes that improve bleaching, preferably manganese complexes with 1, 4, 7-trimethyl-1, 4,7-triazacyclononane (Me-TACN) or 1, 2,4,7-tetramethyl-1,4,7-triazacyclononane (Me4-TACN), since the Bleaching results can be significantly improved with these bleach catalysts.

Preferably, the bleaching system comprises one or more bleaching agents and one or more substances selected from the group consisting of bleach activators and bleach catalysts. Particularly preferably, the bleaching system comprises one or more bleaching agents, one or more bleach activators and one or more bleach catalysts.

The inventive compositions may comprise other ingredients commonly used in automatic dishwashing detergent compositions. In another preferred embodiment of the invention, the inventive automatic dishwashing detergent compositions comprise one or more compounds selected from the group consisting of enzymes, glass corrosion inhibitors, water, organic solvents, thickening agents, other surfactants, suppressants. of foams, color anti-stain agents, silverware care agents, anti-fogging agents and / or anti-corrosion agents, dyes, fillers, germicides, hydrotropes, antioxidants, enzyme stabilizing agents, perfumes, solubilization, vehicles, processing aids, pigments and agents for pH control.

To increase the cleaning performance, the detergent compositions for the automatic washing of inventive dishes may also contain enzymes. These include proteases, amylases, lipases, hemicellulases, cellulases, perhydrolases or oxidoreductases, as well as preferably mixtures thereof. These enzymes are, in principle, of natural origin. Improved variants based on natural molecules are available for use in detergent compositions for automatic dishwashing, and are correspondingly preferred for use. The detergent compositions for the automatic washing of inventive dishes contain enzymes preferably in amounts of 1x10"6 to 5% by weight, based on the active protein and also based on the total weight of the detergent compositions for automatic dishwashing. The concentration of proteins can be determined by known methods such as the BCA process or the biuret process.

A protein and / or enzyme can be protected, especially during storage, from damage such as inactivation, denaturation or decomposition (for example, resulting from physical influences, oxidation or proteolytic digestion). The inhibition of proteolysis is particularly preferred in the microbial recovery of proteins and / or enzymes, in particular when the inventive automatic dishwashing detergent compositions also contain proteases. The detergent compositions for the automatic washing of inventive dishes may contain stabilizers for this purpose; the provision of said agents in the detergent compositions for the automatic washing of inventive dishes represents a preferred embodiment of the present invention.

Particularly preferred are those detergent compositions for the automatic washing of inventive dishes containing, based on the total weight of the composition, from 0.1 to 12% by weight, preferably from 0.2 to 10% by weight, and in particular from 0.5 to 10% by weight. 8% by weight of the enzyme preparation.

Glass corrosion inhibitors are other preferred ingredients of the detergent compositions for the automatic washing of inventive dishes. The glass corrosion inhibitors prevent the occurrence of turbidity, dipping and scratching, as well as the iridescence, on the glass surface, of the glassware automatically cleaned. Preferred glass corrosion inhibitors include magnesium and zinc salts and magnesium and zinc complexes.

Detergent compositions for the automatic washing of inventive dishes can be prepared in solid or liquid form, as well as a combination of solid and liquid presentation forms.

Because the high alkalinity of the detergent compositions for the automatic washing of inventive dishes contributes to the cleaning performance of these compositions, but also to the corrosive and irritant effect of these compositions, the preferred inventive automatic dishwashing detergent compositions have pH at 20 ° C from 8 to 14, preferably from 9 to 11.5, more preferably from 9.5 to 11.5, measured as a 10% by weight solution of the detergent composition for the automatic liquid dishwashing inventive liquid or solid in water.

The cleaning performance of the detergent compositions for the automatic washing of inventive dishes can be improved by the addition of organic solvents. A preferred embodiment of the present invention is therefore detergent compositions for the automatic washing of dishes containing at least one organic solvent. Preferred liquid inventive detergent automatic washing compositions contain, based on the total weight of the composition, organic solvent in amounts of 0.2 to 15% by weight, preferably 0.5 to 12% by weight, and in particular preference of 1.0 to 10% by weight.

These organic solvents are derived, for example, from monoalcohols, diols, triols or polyols, ethers, esters and / or amides. Organic solvents that are soluble in water are particularly preferred in this context, ie, the "water-soluble" solvents for the purposes of the present application which are solvents that are completely miscible with water (ie, without miscibility gap). at room temperature.

The organic solvents of organic amines and / or alkanolamines are effective in cleaning performance, and in particular with respect to cleaning performance on bleaching stains, in particular on tea stains.

To achieve the desired viscosity for the detergent compositions for the automatic washing of liquid inventive dishes, thickening agents may be added thereto. The used thickeners commonly in detergent automatic dishwashing compositions can also be used in the inventive compositions.

It is advantageous if the detergent compositions for the automatic washing of respective liquid inventive dishes contain the thickening agent in amounts of preferably 0.1 to 8% by weight, more preferably 0.2 to 6% by weight, and particularly preferably 0.4 to 4% by weight. % by weight, based on the total weight of the detergent composition for automatic dishwashing inventive.

The surfactants can be selected from zwitterionic surfactants, anionic surfactants, or mixtures thereof.

The zwitterionic surfactant is preferably selected from the group consisting of amine oxides from Ce to Cie (preferably C12 to Ci8), and sulfo- and hydroxybetaines, such as N-alkyl-N, N-dimethylamino- 1-propansulfonate, wherein the alkyl group may be from Cg to C-ie, preferably from C10 to Cu- The anionic surfactant is preferably selected from alkyl ethoxy sulfates, with the degree of ethoxylation greater than 3 (preferably from 4 to 10, more preferably from 6 to 8), and chain length in the scale from Ce to C16, preferably from Cu to C15. In addition, it has been found that the branched alkylcarboxylates are useful for the purpose of the present invention when the branching occurs in half and the average total length of the chain is 10 to 18, preferably 12 to 16, with the side chain from 2 to 4 carbons in length. An example is 2-butyloctanoic acid. The anionic surfactant is typically of a type which has good solubility in the presence of calcium. Said anionic surfactants are further illustrated by the sulfobetaines, the alkyl (polyethoxy) sulfates (AES), and the short chain C6-C10 alkyl sulfates and alkylsulphonates. It has been shown that straight chain fatty acids are ineffective due to their sensitivity to calcium.

In another preferred embodiment of the present invention, the automatic dishwashing detergent compositions inventive do not comprise other surfactants in addition to the one or more compounds of the formula (I), and the one or more nonionic surfactants of the component b ).

The suppressors of foams, anti-stain agents of color, agents for the care of silverware, anti-fogging agents and / or anti-corrosion agents, dyes, fillers, germicides, hydrotropes, antioxidants, enzyme stabilizing agents, perfumes, solubilization agents, vehicles, processing aids, pigments and agents for pH control can be selected from the respective substances commonly used in automatic dishwashing detergent compositions.

In another preferred embodiment of the invention, the inventive automatic dishwashing detergent compositions do not comprise phosphates, ie they are free of phosphate.

In another preferred embodiment of the invention, the detergent compositions for the automatic washing of inventive dishes are liquid at 20 ° C. The liquid presentation forms, preferably based on water and / or organic solvents, can exist in thickened form as gels. Preferably, the inventive liquid compositions comprise up to 60% by weight of water, more preferably from 10 to 60% by weight of water, and even more preferably from 25 to 60% by weight of water, in each case based on the weight total of the detergent composition for the automatic liquid dishwashing inventive.

In another preferred embodiment of the invention, the detergent compositions for the automatic washing of inventive dishes are solid at 20 ° C. Powders, granulates, extruded materials or compacted materials, in particular tablets, are especially suitable as solid presentation forms. Preferably, the inventive solid compositions comprise less than 20% by weight of water, more preferably from 0.1 to 20% by weight of water, and even more preferably from 0.5 to 5% by weight of water, in each case based on the total weight of the detergent composition for automatic solid ware washing inventive. In another preferred embodiment of the invention, the detergent compositions for the automatic washing of inventive dishes are free of water.

The detergent compositions for the automatic washing of inventive dishes are advantageously suitable for washing dishes in machines for automatic dishwashing, for which the tableware Soiled is treated in an automatic dishwashing machine with an aqueous alkaline composition comprising an inventive automatic dishwashing detergent composition.

Therefore, the present invention also provides a method for washing dishes in an automatic dishwashing machine, which comprises treating soiled ware in an automatic dishwashing machine with an aqueous alkaline composition comprising a composition inventive automatic dishwashing detergent.

In the inventive method of dishwashing, the pH value of the aqueous alkaline composition is preferably 8 or more, and more preferably 9 or more.

It is intended that the following examples illustrate the invention in detail without, however, being limited thereto. Unless explicitly stated otherwise, all percentages are percentages by weight (% in weigh).

Example: Detergent performance test for dishwashing (soiling): dishwasher: Miele G 1222 SC GSL items to test all the new items are pre-treated fouling: with demineralized water in the program Normal echo of a Bosch logixx dishwasher using 5 times the combination of cleaners to be tested, then once 20 g of citric acid, and finally once pure water in the upper grid: 8 Hibal Schott "Paris" on the left and on the right in the lower rack: 3 black porcelain plates 3 square black glass plates 8 blue melamine dishes in the box of knives with 8"solid" knives by WMF handles in the middle OR in the knife basket with handles below: dishwasher program: no. 2"short" (= R0): with pre-wash, main wash at 55 ° C, rinse cycle at 65 ° C Water quantity: 4.6 to 4.8 liters per each of the 4 water inlets for pre-wash, main wash, intermediate rinse and final rinse Water hardness: 14 ° dH (running water) water softening: none dosing of the cleaner: 20 g of a powder cleaner or 1 paper strip, respectively, in the dosing chamber dirt: one bottle upside down with 50 g of frozen modified Stiwa dirt added immediately after the dosing chamber is opened (ie 14 minutes after the start of the program) rinse aid: none number of cleaning cycles: 3 Cooling time: 10 minutes with the door closed, then the door opens and the grids are completely removed evaluation: 30 minutes later when the test items are dry and cold Qualification: 8: without spots or streaks, a 0: large spots and / or stripes very numerous; Film formation is only mentioned when it is so serious that the spots will not be seen after the test: the machine is cleaned once with 20 g of citric acid, and once with pure water in the test program Preparation of dirt and composition of dirt: Recipe for the preparation of 5 kg of dirt: A margarine 500 g B juice powder (Maggi) 125 g potato starch 25 g Benzoic acid 5 g C yolk size M 15 g mustard (Streuber) 125 g tomato sauce 125 g (Heinz) milk with 1.5% of 250 g grease D running water 3.50 liters I A is melted in a 1-liter beaker with the microwave at 600 W for 5 minutes II The components of B are added one after the other to I by mixing well with a manual mixer III The C components are added one after the other in a 10 liter bucket, and mixed well with the mixer IV When II is warm, add to III mixing thoroughly V Then the water is stirred in IV in steps of approximately 0.5 liters to 1 liter, and the mixture is homogenized i The dirt is weighed by 50 g in 100 ml square jars.

Then mix with the mixer Results evaluation - Visual classification: 8: free of spots and streaks 7: few very fine stripes and / or few very small spots 6: few fine stripes and / or some small spots g. thin to medium stripes and / or few medium-sized spots and / or numerous small spots 4: few medium stripes and / or some medium-sized patches medium stripes and / or few large spots and / or numerous medium-sized spots 2_ few wide stripes and / or some large spots and / or very large medium-sized spots 1: wide stripes and / or numerous large spots 0: very large stripes and / or large spots very numerous The individual classifications for each test item are they add together, and the sum is used to compare the different detergent compositions.

Composition of detergent compositions for automatic dishwashing tested: to. i .: active ingredient. the amount in% by weight is not related to the active ingredient, but to the product as it is.

Example 1 Agent system Oleylcetyl ethercarboxylic acid with 2 EO surfactant: EO: ethylene oxide unit (Emulsogen® COL 020) 42% by weight Oxo alcohol of Ci2-is ethoxylated, propoxylated with a cloud point of 42 ° C (1% by weight in water) (Genapol® EP 2584) 58% by weight Comparative example 1 Agent system Oleylcetyl ethercarboxylic acid with 2 EO surfactant: (Emulsogen® COL 020) 100% by weight Comparative example 2 Oxo alcohol agent system of Ci2-is ethoxylated, propoxylated with surfactant: a cloud point of 42 ° C (1% by weight in water) (Genapol® EP 2584) 100% by weight Comparative example 3 Agent system Oleylcetyl ethercarboxylic acid with 2 EO surfactant: (Emulsogen® COL 020) 40% by weight Nonionic surfactant with a cloud point of 18 ° C (1% by weight in water) (C8 / 10 alcohol crowned with 1,2 epoxidedecano + 40 EO) 60% by weight The values for the total fouling result using the compositions of Example 1 and Comparative Examples 1, 2 and 3 are given in Table A below.

TABLE A Values for the total result fouling From the results of Table A above, it can be seen that the use of the inventive composition of Example 1 results in better values for the total fouling result as compared to the use of the compositions in accordance with Comparative Examples 1, 2 and 3.

In addition, in the previous example, the inventive composition of Example 1 shows a very good overall cleaning performance.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - A detergent composition for automatic dishwashing, comprising: a) one or more compounds of the formula (I): RO - -CH2CH20 COOM (I) wherein: R is a linear or branched saturated alkyl group comprising from 8 to 30 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 30 carbon atoms, n is a number from 1 to 20 and M is a counter ion, b) one or more nonionic surfactants having a cloud point of 30 ° C or more and preferably having a cloud point of 40 ° C or more, c) a or more detergency builders, and d) a bleaching system comprising one or more oxygen bleaching agents and one or more substances selected from the group consisting of bleach activators and bleach catalysts.

2. - The detergent composition for automatic dishwashing according to claim 1, further characterized in that the counter ion M in the one or more compounds of the formula (I) is selected from the group consisting of H +, Na +, K? +2 / 2, Ca2 + / 2, NH4 +, monoethanolammonium, diethanolammonium and triethanolammonium.

3. The detergent composition for automatic dishwashing according to claim 2, further characterized in that the counterion M in the one or more compounds of the formula (I) is selected from the group consisting of H +, Na + and K +.

4. The detergent composition for automatic dishwashing according to one or more of claims 1 to 3, further characterized in that R in the one or more compounds of the formula (I) is a linear or branched saturated alkyl group comprising 12 to 18 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 12 to 18 carbon atoms.

5. - The detergent composition for automatic dishwashing according to claim 4, further characterized in that R in the one or more compounds of the formula (I) is a linear or branched saturated alkyl group comprising from 16 to 18 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 16 to 18 carbon atoms.

6. The detergent composition for automatic dishwashing according to one or more of claims 1 to 5, further characterized in that in the one or more compounds of the formula (I), 50% by weight or more of the R groups are linear or branched unsaturated alkenyl groups with one or more double bonds.

7. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 6, further characterized in that R in the one or more compounds of the formula (I) is a linear group.

8. The detergent composition for automatic dishwashing according to one or more of claims 1 to 7, further characterized in that R in the compound of the formula (I) is an oleyl group.

9. The detergent composition for automatic dishwashing according to one or more of claims 1 to 8, further characterized in that n in the one or more compounds of the formula (I) is a number from 1 to 3.

10. - The detergent composition for automatic dishwashing according to claim 9, further characterized in that n in the one or more compounds of the formula (I) is 2.

11. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 10, further characterized in that it comprises the one or more compounds of the formula (I) in amounts of 0.1 to 15% by weight, preferably in amounts of 0.2 to 10% by weight, and more preferably in amounts of 0.2 to 5% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing.

12. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 11, further characterized in that the one or more nonionic surfactants of component b) are selected from the compounds of the formula (II): R10 - (- AO-) x-Z (II) wherein: R1 is a linear or branched saturated alkyl group comprising from 8 to 30 carbon atoms or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 8 to 30 carbon atoms, A is selected from group consisting of -C2H4- and -C3H6-, x is a number from 1 to 150, Z is H, a linear or branched alkyl group having from 1 to 30 carbon atoms, or a group -CH (OH) - R3, and R3 is a linear or branched alkyl group having from 1 to 30 carbon atoms, and wherein the group - (- AO-) x- comprises one or more groups -C2H4O-, and may additionally comprise one or more groups -C3H60-, and in case the group - (- AO-) x- simultaneously comprises -C2H40- and -C3H6O- groups, the groups -C2H4O- and -C3H6O- can be distributed over the group - (- AO -) x- in any way, preferably in a gradient or block type statistical manner, and particularly preferably in a block type manner, and the molar amount of the -C2H4 groups O- in the group - (- ?? -)? - is preferably greater than the molar amount of the -C3H6O- groups.

13. - The detergent composition for automatic dishwashing according to claim 12, further characterized in that the one or more nonionic surfactants of component b) on average comprise 8 groups -C2H4O- and 4 groups -C3H6O-, R1 is a linear or branched saturated alkyl group comprising from 12 to 15 carbon atoms carbon or a linear or branched unsaturated alkenyl group with one or more double bonds and comprising from 12 to 15 carbon atoms and Z is H.

14. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 13, further characterized in that it comprises the one or more nonionic surfactants of component b) in amounts of 0.1 to 15% by weight, preference in amounts of 0.2 to 10% by weight, and more preferably in amounts of 0.2 to 5% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing.

15. The detergent composition for automatic dishwashing according to one or more of claims 1 to 14, further characterized in that it is free of nonionic surfactants having a cloud point of less than 30 ° C.

16. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 15, further characterized in that it comprises the one or more builder substances in amounts of 5 to 90% by weight, and preferably in amounts from 5 to 80% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing.

17. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 16, further characterized in that the oxygen bleaching agents are selected from the group of sodium percarbonate, perborate tetrahydrate of sodium, sodium perborate monohydrate, peroxypyrophosphates, citrate perhydrates, peracid salts or peracids that give H202.

18. - The detergent composition for automatic dishwashing according to claim 1, further characterized in that it comprises the bleaching system in amounts of 0.1 to 40% by weight, preferably in amounts of 0.5 to 30% by weight, and more preferably in amounts of 3 to 25% by weight, in each case based on the total weight of the detergent composition for automatic dishwashing.

19. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 18, further characterized in that it comprises one or more compounds selected from the group consisting of enzymes, glass corrosion inhibitors, water, organic solvents, thickening agents, other surfactants, foam suppressants, color stain agents, care agents of silverware, anti-fogging agents and / or anti-corrosion agents, dyes, fillers, germicides, hydrotropes, antioxidants, enzyme stabilizing agents, perfumes, solubilization agents, vehicles, processing aids, pigments and agents for the control of pH.

20. - The detergent composition for automatic dishwashing according to one or more of claims 1 to 19, further characterized in that it does not comprise other surfactants in addition to the one or more compounds of the formula (I) and the one or more nonionic surfactants of component b).

21. - A method of washing dishes in a machine for automatic dishwashing, which comprises treating a dish soiled in a machine for automatic dishwashing with an aqueous alkaline composition comprising a detergent composition for automatic dishwashing in compliance with one or more of claims 1 to 20.

22. - The method according to claim 21, further characterized in that the pH value of the aqueous alkaline composition is 8 or more, and preferably 9 or more.